Device for reeling and unreeling a power supply line

ABSTRACT

A device for unidirectionally reeling and unreeling a power supply line includes: an upper bearing; a lower bearing; an upper cover; a lower cover; a rotary disc; a plug; a coil spring installed in the coil spring receiving space, on an outer wall of which a plurality of reeling-unreeling control grooves arranged uniformly; a clip body being installed on the rotary disc and used for clipping the power supply line; a conductive unit located in the clip body; and a reeling-unreeling control assembly installed on the lower cover for controlling a reeling-unreeling length of the power supply line. The device for reeling and unreeling a power supply line can be unreeled unidirectionally, can adapt to different voltages and apply to two-core or three-core power supply line, as well as has high safety.

FIELD OF THE TECHNOLOGY

The present invention relates to a device for reeling and unreeling apower supply line, and more particularly, to a device forunidirectionally reeling and unreeling a power supply line.

BACKGROUND OF THE TECHNOLOGY

In related art, a power supply line for electrically connecting homeappliances or office appliances, especially variable portable appliancessuch as a notebook, to a power supply is used by the following twomodes: 1) one end of the power supply line with a certain length isconnected to the appliances and the other end thereof is connected to aplug for electrically connecting to a socket when using the appliances;2) a device for reeling and unreeling a power supply line is used toreel the power supply line for electrically connecting the appliances tothe socket. In the first mode, the power supply line is in a state ofdisorder, and the power supply line tends to be contaminated and thenbecomes dirty. Since the length of the power supply line in the firstmode is invariable, the power supply line can not adapt to therequirement of variable distances. Thus the device in the first mode isinconvenient and unsafe.

In the second mode, the variable devices for reeling and unreeling apower supply line in the prior art have mainly the followingdisadvantages:

1. Most of the present devices for reeling and unreeling a power supplyline are designed to be unreeled bidirectionally, and thebidirectionally unreeled portions of the power supply line have equallength, thereby the present devices can not meet the requirement ofunidirectionally unreeling one end of the power supply line.2. Most of the present devices for reeling and unreeling a power supplyline are designed to automatically and bidirectionally reel the powersupply lines, which may result that the devices automatically reel thepower supply lines when being occasionally touched, thus the appliancesmay be damaged or switched off suddenly.3. Most of the present devices for reeling and unreeling a power supplyline can only be applied to related light-current products, due to thelimited space of the present devices and a required toughness of thepower supply line. Even though some of the devices can be used inheavy-current products, the volumes of these devices are too large to beconvenient to carry.4. A clip means of the devices for reeling and unreeling a power supplyline are abraded after a period of usage, thus the devices would becomeunusable, which would cause great waste.

Aiming at the above-mentioned disadvantages of the present devices forreeling and unreeling a power supply line, the designer developed a newtype device for unidirectionally reeling and unreeling a power supplyline.

SUMMARY

A device for reeling and unreeling a power supply line so as toeliminate the above-mentioned disadvantages in the prior art isprovided. Concretely, the device can apply to portable appliances orother productions used at different voltages by unidirectionallyunreeling and freely controlling the power supply line therein. Thus itis convenient to use.

One embodiment of a device for unidirectionally reeling and unreeling apower supply line, includes: an upper bearing and a lower bearing; anupper cover formed with an upper bearing installation boring forinstalling the upper bearing and an outlet for reeling or unreeling thepower supply line; a lower cover formed with a lower bearinginstallation boring for installing the lower bearing and areeling-unreeling control assembly installation boring; a rotary discformed with a coil spring receiving space on one side thereof and acylinder-like reeling post at a center portion of the other side thereofand supported by the upper bearing and the lower bearing rotatably, aplurality of reeling-unreeling control grooves being uniformly arrangedon an outer wall of the coil spring receiving space, and the powersupply line being reeled on the reeling post; a plug connected to oneend of the power supply line; a coil spring installed in the coil springreceiving space; a clip body for clipping the power supply line; aconductive unit located in the clip body; and a reeling-unreelingcontrol assembly installed in the reeling-unreeling control assemblyinstallation boring of the lower cover and used for controlling areeling-unreeling length of the power supply line.

The conductive unit may include: an upper electrode pole electricallyconnected to one core of the power supply line and located in the upperbearing; a lower electrode pole electrically connected to the other coreof the power supply line and located in the lower bearing; and aninsulator provided between the upper electrode pole and the lowerelectrode pole.

The upper electrode pole, the lower electrode pole and the insulator maybe provided in the clip body by injection molding.

The conductive unit may include: a grounding metal shaft; an upperinsulator provided around an upper part of the grounding metal shaft; anupper electrode sleeve provided around the upper insulator,electronically connected to one core of the power supply line andlocated in the upper bearing; a lower insulator provided around a lowerpart of the grounding metal shaft; a lower electrode sleeve providedaround the lower insulator, electronically connected to the other coreof the power supply line and located in the lower bearing.

The grounding metal shaft, the upper insulator, the upper electrodesleeve, the lower insulator and the lower electrode sleeve may beprovided in the clip body by injection molding.

The reeling-unreeling control assembly may further include an elasticmechanism; and the reeling-unreeling control assembly is fixed on thelower cover by screw connection or snap-fit connection.

The elastic mechanism may be a torsion spring.

A sliding surface for guiding may be formed between any two adjacentreeling-unreeling control grooves uniformly arranged on the outer wallof the coil spring receiving space.

The upper cover and the lower cover may be fixed together by snap-fitconnection or screw connection.

The upper cover and the lower cover may be formed integrally byultrasonic molding.

The device for reeling and unreeling a power supply line can overcomesome of the above-mentioned disadvantages existing in the prior art. Thedevice can apply to portable appliances or other productions used atdifferent voltages by unidirectionally reeling and unreeling the powersupply line and freely controlling the power supply line therein. Thusit is convenient to use. In addition, the power supply line can be fixedbetter and the reeling-unreeling operation may be controlled by manual,which can obviously improve safety. The device for reeling and unreelinga power supply line can adapt to different voltages and can apply totwo-core or three-core power supply line.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic perspective exploded view of the first embodimentof the device for reeling and unreeling a power supply line;

FIG. 2 is a schematic perspective view of an upper cover and a rotarydisc of the first embodiment of the device for reeling and unreeling apower supply line;

FIG. 3 is a schematic perspective view of a lower cover and areeling-unreeling control assembly of the first embodiment of the devicefor reeling and unreeling a power supply line;

FIG. 4 is a sectional view of the first embodiment of the device forreeling and unreeling a power supply line;

FIG. 5 is a schematic perspective explosed view of the second embodimentof the device for reeling and unreeling a power supply line; and

FIG. 6 is a sectional view of the second embodiment of the device forreeling and unreeling a power supply line.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Referring to a first embodiment of a device for reeling and unreeling apower supply line shown in FIGS. 1-4, the device for reeling andunreeling a power supply line is a device for unidirectionally reeledand unreeled a power supply line, and includes an upper bearing 2 and alower bearing 9; an upper cover 1 formed with an upper bearinginstallation boring 13 for installing the upper bearing 2 and an outlet12 for reeling and unreeling the power supply line 5; a lower cover 10formed with a lower bearing installation boring 101 for installing thelower bearing 9 and a reeling-unreeling control assembly installationboring 102; a rotary disc 7 formed with a coil spring receiving space 73on one side thereof and a cylinder-like reeling post 71 at a centerportion of the other side thereof and supported by the upper bearing 2and the lower bearing 9 rotatably, a plurality of reeling-unreelingcontrol grooves 731 being uniformly arranged on an outer wall of thecoil spring receiving space 73, and the power supply line 5 being reeledon the reeling post 71; a plug 6 connected to one end of the powersupply line 5; a coil spring 8 installed in the coil spring receivingspace 73; a clip body 4 for clipping the power supply line 5 andprovided with stoppers 41 for fixing the clip body 4 in the reeling post71, in which the stoppers 41 are corresponding to and installed in clipgrooves 72 formed on the reeling post 71; a conductive unit 3 located inthe clip body 4; and a reeling-unreeling control assembly 11 installedin the reeling-unreeling control assembly installation boring 102 of thelower cover 10 for controlling a reeling-unreeling length of the powersupply line 5.

Preferably, the conductive unit 3 includes an upper electrode pole 31electrically connected to one core of the power supply line 5 andlocated in the upper bearing 2; a lower electrode pole 33 electricallyconnected to the other core of the power supply line 5 and located inthe lower bearing 9; and an insulator 32 provided between the upperelectrode pole 31 and the lower electrode pole 33.

Preferably, the upper electrode pole 31, the lower electrode pole 33 andthe insulator 32 are provided in the clip body 4 by injection molding.Firstly, the upper electrode pole 31, the lower electrode pole 33 andthe insulator 32 are formed integrally to one piece by injectionmolding, such that the insulator 32 is firmly located between the upperelectrode pole 31 and the lower electrode pole 33. Then, the piece andthe clip body 4 are formed integrally by injection molding. Of course,the electrode pole 31, the lower electrode pole 33, the insulator 32 andthe clip body 4 can be combined together by other methods.

Referring to a second embodiment of a device for reeling and unreeling apower supply line shown in FIGS. 5 and 6, a conductive unit 30 includesa grounding metal shaft 303 connected to a ground wire; an upperinsulator 302 provided around an upper part of the grounding metal shaft303; an upper electrode sleeve 301 provided around the upper insulator302, electronically connected to one core of the power supply line 5 andlocated in the upper bearing 2; a lower insulator 304 provided around alower part of the grounding metal shaft 303; a lower electrode sleeve305 provided around the lower insulator 304, electronically connected tothe other core of the power supply line 5 and located in the lowerbearing 9.

Preferably, the grounding metal shaft 303, the upper insulator 302, theupper electrode sleeve 301, the lower insulator 304 and the lowerelectrode sleeve 305 are provided in the clip body 4 by injectionmolding.

Preferably, the reeling-unreeling control assembly 11 can be installedon the lower cover 10 by screw connection with a screw 113 or snap-fitconnection. Additionally, the reeling-unreeling control assembly 11further includes a torsion spring 111 and a rotatable control element112. The control element 112 could be used as a ratchet pawl forengaging with the reeling-unreeling control grooves 731. Thus, thereeling-unreeling control assembly 11 can control the reeling-unreelinglength of the power supply line 5.

Preferably, a sliding surface 732 for guiding may be formed between anytwo adjacent reeling-unreeling control grooves 731 uniformly arranged onthe outer wall of the coil spring receiving space 73.

Preferably, the upper cover 1 and the lower cover 10 are fixed togetherby snap-fit connection or screw connection, or formed integrally byultrasonic molding.

The device for reeling and unreeling a power supply line can overcomesome of the above-mentioned disadvantages existing in the prior art. Thedevice can be used in portable appliances or other productions used atdifferent voltages by unidirectionally unreeling and freely controllingthe power supply line therein. Thus it is convenient to use. Inaddition, the power supply line can be fixed better and thereeling-unreeling operation may be controlled by manual, thus canobviously improve safety. The device for reeling and unreeling a powersupply line can adapt to different voltages and can apply to two-core orthree-core power supply line.

The contents disclosed in the present application are only twopreferable embodiments. All changes and modifications that fall withinthe metes and bounds of the claims, or equivalents of such metes andbounds are therefore intended to be embraced by the appended claims.

1. A device for unidirectionally reeling and unreeling a power supplyline, including: an upper bearing and a lower bearing; an upper coverformed with an upper bearing installation boring for installing theupper bearing and an outlet for reeling or unreeling the power supplyline; a lower cover formed with a lower bearing installation boring forinstalling the lower bearing and a reeling-unreeling control assemblyinstallation boring; a rotary disc formed with a coil spring receivingspace on one side thereof and a cylinder-like reeling post at a centerportion of the other side thereof and supported by the upper bearing andthe lower bearing rotatably, a plurality of reeling-unreeling controlgrooves being uniformly arranged on an outer wall of the coil springreceiving space, and the power supply line being reeled on the reelingpost; a plug connected to one end of the power supply line; a coilspring installed in the coil spring receiving space; a clip body beinginstalled on the rotary disc and used for clipping the power supplyline; a conductive unit located in the clip body; and areeling-unreeling control assembly installed in the reeling-unreelingcontrol assembly installation boring of the lower cover and used forcontrolling a reeling-unreeling length of the power supply line.
 2. Thedevice for unidirectionally reeling and unreeling a power supply lineaccording to claim 1, wherein the conductive unit includes: an upperelectrode pole electrically connected to one core of the power supplyline and located in the upper bearing; a lower electrode poleelectrically connected to the other core of the power supply line andlocated in the lower bearing; and an insulator provided between theupper electrode pole and the lower electrode pole.
 3. The device forunidirectionally reeling and unreeling a power supply line according toclaim 1, wherein the conductive unit includes: a grounding metal shaft;an upper insulator provided around an upper part of the grounding metalshaft; an upper electrode sleeve provided around the upper insulator,electronically connected to one core of the power supply line andlocated in the upper bearing; a lower insulator provided around a lowerpart of the grounding metal shaft; a lower electrode sleeve providedaround the lower insulator, electronically connected to the other coreof the power supply line and located in the lower bearing.
 4. The devicefor unidirectionally reeling and unreeling a power supply line accordingto claim 2, wherein the upper electrode pole, the lower electrode poleand the insulator are provided in the clip body by injection molding. 5.The device for unidirectionally reeling and unreeling a power supplyline according to claim 3, wherein the grounding metal shaft, the upperinsulator, the upper electrode sleeve, the lower insulator and the lowerelectrode sleeve are provided in the clip body by injection molding. 6.The device for unidirectionally reeling and unreeling a power supplyline according to claim 1, wherein the reeling-unreeling controlassembly further includes an elastic mechanism; and thereeling-unreeling control assembly is fixed on the lower cover by screwconnection or snap-fit connection.
 7. The device for unidirectionallyreeling and unreeling a power supply line according to claim 6, whereinthe elastic mechanism is a torsion spring.
 8. The device forunidirectionally reeling and unreeling a power supply line according toclaim 1, wherein a sliding surface for guiding is formed between any twoadjacent reeling-unreeling control grooves uniformly arranged on theouter wall of the coil spring receiving space.
 9. The device forunidirectionally reeling and unreeling a power supply line according toclaim 1, wherein the upper cover and the lower cover are fixed togetherby snap-fit connection or screw connection.
 10. The device forunidirectionally reeling and unreeling a power supply line according toclaim 1, wherein the upper cover and the lower cover are formedintegrally by ultrasonic molding.